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Boiled linseed oil is more a surface finish, the Raw linseed will soak into the wood and won't affect your working clearance's. Mike.

Making your cams and pushrods from Maple which is a good close grained wood, you could soak the components in Raw Linseed Oil this will give them a nice wearing working surface, joiners who used Beech hand planes used this trick it made using the planes easier and the sole of the plane lasted...

Colin and Ian, Thanks for the kind comments on my Wyvern.

Thanks Gus, I am sure you will have a good running engine with your Wyvern, hope to hear soon that you have your engine up and running. Mike.

I have been building the Wyvern which to me was a bit of a challenge, I have now got it finished and running, I don't think I can better it's running settings and I am calling it finished, when I say challenge my other engines have been Hit and Miss which I think are a easier build...

Hi Gus. Good to see you back on the Wyvern build, I have the No 70 jet size on my engine and the needle just needs to be opened very slightly but I suppose the needle taper may have something to do with that, but the engine tends to run rich and I am beginning to think it needs more air through...

A UK site for tethered cars and boats may help you, see link. http://www.onthewire.co.uk/index.htm

As a joiner by trade (now retired) a loose hammer head can be fixed simply by fitting a new hardwood wedge, the head is tightened on the shaft by hitting the end of the hammer shaft with another hammer, this has the effect of driving the loose head a little bit further onto the shaft, then fit a...

Hi Gus. Good to hear the Wyvern is up and running again, it looks like just a bit of fine tuning is needed and you will have a reliable engine, as you say the Wyvern is a nice looking engine. Hope your Mom gets well soon. Mike.

HI Gus, Maybe Hylomar is only available here in the UK, I hope your new gasket is a success, have you given any thought to using a PTFE ( Teflon ) sealer or the tape to form a seal, I have used the PTEF plumbers tape to seal steam covers on my steam engine. I used the tape to seal the flange...

Hi Gus. I was thinking that a very thin metal shim gasket might do the job, but I was also thinking that a lapped mating face and no gasket would be OK. The cylinder head on my Wyvern has no gasket just a thin smear of Hylomar gasket sealer, my cylinder head is a one piece casting as supplied...

Gus, Could the gasket be the cause of the over heated head, my thinking is that a finned head acts like a heat sink, and maybe your gasket is acting like a insulator and stopping full heat dissipation through the head, just a bit of food for thought. Mike.

Hi Gus. Looks like you will have a running engine having found the cause of the initial problem, by the way I thought I would give my Wyvern a run up the other day, and what is normally a good starting engine it just wouldn't start, I was five minutes trying and then noticed the plug lead...

Hi Gus. Your engine starts with a fuel prime, would choking the carb air supply give a richer mix to get the engine running. Mike.

Hi Gus. You are getting well on with the Wyvern I like the water cooling set up and the fuel tank, it's starting to look the part, looking foward to the running stage. Although I have my Wyvern finished I look through your threads and get some good info on the way you went about some of the...

From another West Cumbrian, you will find a lot of expertise and help on this Forum. Mike.

Have you thought what effect the hot exhaust gas would have on the O-ring as it passes over the ring, my thinking is that the direct heat on the O-ring would ruin the seal, just my own thought on this. Mike.

Gus. I made the slot length in the throttle barrel just to give a 1/32" opening at the slow running position, this opening was just a guess on my part, and my engine runs slow at that setting. However a better way may be to allow the throttle barrel to fully close the port and arrange a...

Gus. Good to hear that the JB Weld repair worked on your fuel inlet, and I can say that the same repair job on my Wyvern is giving no problem. Mike.

Gus. The carb valve seat, I had a similar problem as yours what I did I put the plain end of the drill into the hole having put a bit of wax (release agent ) on the shank, then I made up the groove with a bit of JB Weld, when set withdraw the drill and you are left with a nice hole where it...